[OSM-talk] NMEA altitude versa barometric altitude

[Barnett, Phillip]

But for our purposes, we don't need to collect height data anyway -
can't we use the SRTM data, as processed by Dave Storey?
http://www.smc.org.uk/contour_maps2.htm

Unless you live above 60N or below 60S, of course.

-----Original Message-----
From: talk-bounces at openstreetmap.org
[mailto:talk-bounces at openstreetmap.org] On Behalf Of David Sheldon
Sent: 07 September 2006 19:06
To: talk at openstreetmap.org
Subject: Re: [OSM-talk] NMEA altitude versa barometric altitude

On Sat, Sep 02, 2006 at 07:40:28PM +0100, Nick Hill wrote:
> So typical Garmin Geko elevation accuracy is around
> +/-300ft - useless for most purposes. 

I found it was pretty accurate when I climbed the Old Man of Coniston.
On the top my GPS read within 1m of the spot-height the map marked for
the trig point, and all the way up it was within 10m of a bariometric
altimeter that was carried by another member of the group. Maybe in
towns it isn't very accurate, but on mountains it seems fine.

David

-- 
If God had a beard, he'd be a UNIX programmer.

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